According to McKinley, why couldn't the US allow Europe to take control over the Philippines back? Of Mckinley's four reason for annexation, which do you think appeals to his audience (at the time of this speech) the most and why?

pls help I need help on these 2 questions!​

The california gold rush: actually had only a small impact on california’s population because its rich farmlands already attracted thousands of new settlers each year. attracted almost equal numbers of men and women. resulted in laws that discriminated against “foreign miners.” made considerable wealth for average miners because gold mining demanded no real investment of capital. hurt the development of san francisco because gold discoveries shifted interest to areas outside of town.

How did the completion of the transcontinental railroad change the lives of american citizens? a-it increased the wealth of all americans and enabled them to travel more. b-it made cross-country travel too expensive for ordinary americans. c-it decreased the safety of americans who moved to settle the plains. d-it shortened travel time between the east and west for all americans.

What is the main reason the united states removed the taliban from power shortly after the september 11 2001 attacks ?